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Gaming Performance Comparison

Recommended System Requirements
Game Radeon R9 270X Asus DirectCU II 4GB Edition Radeon HD 7870 PCS+ Vortex II Edition
Cyberpunk 2077 95% 103%
Assassins Creed: Valhalla 79% 86%
Call of Duty: Black Ops Cold War 73% 80%
FIFA 21 1% 2%
Watch Dogs Legion 88% 96%
Microsoft Flight Simulator 73% 80%
World of Warcraft: Shadowlands 180% 191%
Grand Theft Auto VI 175% 186%
Godfall 217% 230%
Genshin Impact 95% 103%

In terms of overall gaming performance, the graphical capabilities of the AMD Radeon R9 270X Asus DirectCU II 4GB Edition are marginally better than the AMD Radeon HD 7870 PCS+ Vortex II Edition.

The HD 7870 has a 100 MHz higher core clock speed and the same number of Texture Mapping Units as the R9 270X. This results in the HD 7870 providing 8 GTexel/s better texturing performance. This still holds weight but shader performance is generally more relevant, particularly since both of these GPUs support at least DirectX 10.

The HD 7870 has a 100 MHz higher core clock speed than the R9 270X and the same number of Render Output Units. This results in the HD 7870 providing 3.2 GPixel/s better pixeling performance. However, both GPUs support DirectX 9 or above, and pixeling performance is only really relevant when comparing older cards.

The R9 270X was released over a year more recently than the HD 7870, and so the R9 270X is likely to have better driver support, meaning it will be more optimized for running the latest games when compared to the HD 7870.

Both GPUs exhibit very powerful performance, so it probably isn't worth upgrading from one to the other, as both are capable of running even the most demanding games at the highest settings.

The R9 270X has 2048 MB more video memory than the HD 7870, so is likely to be much better at displaying game textures at higher resolutions. This is supported by the fact that the R9 270X also has superior memory performance overall.

The R9 270X has 19.2 GB/sec greater memory bandwidth than the HD 7870, which means that the memory performance of the R9 270X is slightly better than the HD 7870.

Both the Radeon R9 270X Asus DirectCU II 4GB Edition and the Radeon HD 7870 PCS+ Vortex II Edition have 1280 Shader Processing Units. While the two GPUs have the same number of SPUs, the actual performance delivered by the HD 7870 is 1251 and by the R9 270X is 1251. Knowing that the shader performance of the HD 7870 is superior, it is not necessary to examine the GPUs' respective Texture and Pixel Fill Rates.

The Radeon R9 270X Asus DirectCU II 4GB Edition requires 225 Watts to run but there is no entry for the Radeon HD 7870 PCS+ Vortex II Edition. We would recommend a PSU with at least 500 Watts for the R9 270X and a PSU with at least 500 Watts for the HD 7870. The two GPUs have been recommended a PSU with the same amount of wattage. As such, there is no need to worry about which will more significantly affect your yearly electricity bills.

Game FPS Benchmarks On Ultra

GPU Architecture

Core Speed1050 MHzvs1150 MHz
Boost Clock1100 MHzvs-
ArchitectureGCN 1.1 Curacao XTGCN 1.0 Pitcairn XT
OC Potential Poor vs Poor
Driver Support Great vs Good
Release Date09 Oct 2013vs01 Sep 2012
GPU LinkGD LinkGD Link

Resolution Performance

1366x768 - green tick vs green tick -
green tick vs green tick
green tick vs
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GPU Memory

Memory4096 MBvs2048 MB
Memory Speed1400 MHzvs1250 MHz
Memory Bus256 Bitvs256 Bit
Memory TypeGDDR5vsGDDR5
Memory Bandwidth179.2GB/secvs160GB/sec
L2 Cache 512 KB green tick vs green tick 512 KB
Delta Color Compression no vs no
Memory Performance 0% green tick vs green tick 0%

GPU Display

Shader Processing Units1280vs1280
Actual Shader Performance58%vs60%
Texture Mapping Units80vs80
Texture Rate84 GTexel/svs92 GTexel/s
Render Output Units32vs32
Pixel Rate33.6 GPixel/svs36.8 GPixel/s

GPU Outputs

Max Digital Resolution (WxH)4096x2160vs4096x2160
VGA Connections0vs0
DVI Connections2vs2
HDMI Connections1vs1
DisplayPort Connections-vs-

GPU Power Requirements

Max Power225 Watts-
Recommended PSU500 Wattsvs500 Watts

GPU Features

Shader Model5.0vs5.0
Open GL4.4vs4.4
Open CL-vs-
Notebook GPUnono

GPU Supporting Hardware

Recommended ProcessorIntel Core i5-4430 3.0GHzvsIntel Core i5-3570K 3.4GHz
Recommended RAM8 GBvs8 GB
Maximum Recommended Gaming Resolution1920x1080vs1920x1080

Gaming Performance Value

Performance Value

GPU Mini Review

Mini ReviewRadeon R9 270X Asus DirectCU II 4GB Edition is a special edition of the high-end Radeon R9 270X.
This edition comes with a custom cooling system called "DirectCU II", which reduces the card's temperature under load, significantly and comes overclocked out of the box in the central unit that was increased from 1000MHz to 1050MHz, while the Boost clock is now of 1100MHz. Furthermore the frame buffer was doubled to 4GB. However, this is a gimmick and it will not yield any extra performance, thus the card offers exactly the same performance that 2GB version does.
Benchmarks indicate a 2.5% performance boost over the standard edition and so this card performs on level with a Radeon HD 7950.
Radeon HD 7870 PCS+ Vortex II Edition is a special edition of Radeon HD 7870.
This is one of today's most powerful editions of the reference as it features increases in both the core and memory clocks that went from 1000MHz to 1150MHz and from 1200MHz to 1250MHz.
Benchmarks indicate the performance boost is quite extreme and around 8% when compared to the reference Radeon HD 7870.
Recommended CPU
Possible GPU Upgrades
GPU Variants